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<!DOCTYPE HTML>
<html>
<body>
<script>
if (('sessionStorage' in window) && window.sessionStorage !== null) {
try {
sessionStorage.setItem("name", "user1");
sessionStorage.setItem("name", "user2");
} catch (e) {
window.opener.postMessage({error: "setItem method is failed."}, '*');
}
sessionStorage.clear();
} else {
window.opener.postMessage({error: "sessionStorage is not supported."}, '*');
}
window.opener.postMessage({done: true}, '*');
</script>
</body>
</html>